Answer:
The answer is "The coal and steel industries".
Step-by-step explanation:
In compliance with the terms of the 1975 Constitutional Act, on 5 June 1975, the UK promised a Vote on Inclusion in the European Union, often alluded to as the Vote on the European Union, the Single Market Vote as the EEC Participation referendum to measure support.
This Group established its Council of Europe Coal and Steel Community, that consolidated free flow of coal and steel as well as the freedom of access to sources of production in 6 countries.